:exception:

:singleton_method: 
:instance_method: 
  :==: [TrueClass,FalseClass]
  :backtrace: [Array, NilClass]
  :cause: [Exception,NilClass]
  :inspect: [String]
  :message: [String]
  :to_s: [String]
  :set_backtrace: [NilClass,String,Array]